Production process of solenoid valve moving iron core
A production process and solenoid valve technology, which is applied in the direction of improving process efficiency and energy efficiency, can solve the problems of hidden cracks in the moving iron core parts of solenoid valves, numerous processing procedures, and high production costs, and achieve high production efficiency and high processing technology. Simple, the effect of reducing material loss
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Embodiment 1
[0026] Embodiment 1: a kind of production technology of electromagnetic valve easy welding material, the chemical composition (weight percentage) of raw material is as follows:
[0027] C content is 0.025%, Si content is 1.40%, Mn content is 0.85%, P content is 0.025%, S content is 0.013%, Cr content is 17.0%, Mo content is 0.30%, W content is 0.7%, and the balance is iron Fe.
[0028] The warm pier production process of the solenoid valve moving iron core includes the following process steps:
[0029] 1. Select ￠9.80±0.02mm ferritic stainless steel bar or wire, use resistance heating on-line coating machine to coat, and control the heating temperature within the range of 70-80°C when coating;
[0030] 2. Use 18 kHz frequency conversion temperature regulation super audio on-line induction heating to heat the material to 600±10°C to meet the temperature pier forming and no hidden danger of cracks, and then cut the above material into a piece according to the weight requirements...
Embodiment 2
[0039] Embodiment 2: The raw materials used in the electromagnetic valve moving iron core are basically the same as in Embodiment 1; the difference between the raw materials and Embodiment 1 is that the Mo content is 0.35%, and the W content is 0.65%.
[0040] The production process is basically the same as in Example 1. The difference between the production process and Example 1 is that the third annealing process uses 980±10°C for 10-20 minutes, and 580±10°C for the purpose of restoring the magnetic properties to the standard. State, the grain size of the semi-finished solenoid valve moving iron core is 6-8, which meets the needs of the minimum working voltage and temperature rise.
[0041] In this embodiment, there is no abnormality such as cracking in the parts of the Wendun, and the reserved margin of the semi-finished parts of the Wendun is sufficient to meet the requirements of finishing; the processed electromagnetic valve moving iron core has no cracks after the magnet...
Embodiment 3
[0044] Embodiment 3: The raw materials used in the electromagnetic valve moving iron core are basically the same as in Embodiment 1; the difference between the raw materials and Embodiment 1 is that the Mo content is 0.65%, and the W content is 0.35%.
[0045] Using the same production process as in Example 1, the obtained electromagnetic valve moving iron core has a crack rate of <0.1% and is resistant to corrosion for 2900 hours in 3% NaCl aqueous solution.
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